scholarly journals Performance evaluation of filtration and ultrafiltration for municipal secondary effluent reuse

2020 ◽  
Keyword(s):  
Environmental Protection Agency ◽  
Fecal Coliform ◽  
Total Coliform ◽  
Physical Parameters ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Protection Agency ◽  
Effluent Quality ◽  
Membrane Flux ◽  
The Us

<p>This study aimed to evaluate the performance of microscreen drum filter and ultrafiltration (UF) as a ‎tertiary treatment to improve the secondary effluent quality. Additionally, hydraulic loading of ‎drum filter and membrane flux of UF were changed. On average, the use of drum filter and UF ‎reduced TSS to 50% and 100%, respectively. Furthermore, drum filter, on average, was capable of ‎reducing turbidity and COD to 36 and 20%, and UF decreased them to 76 and 39%, respectively. ‎Fecal coliform and total coliform were reduced to 74 and 76% in drum filter and 5.28 and 5.08 log ‎in UF, respectively. The results revealed that the combination of microscreen and UF is an effective ‎hybrid process for reducing physical parameters and coliforms in secondary effluent so that it can ‎meet the US Environmental Protection Agency standards for many uses, including unrestricted ‎urban uses and agricultural irrigation for food crops.‎</p>

scholarly journals Benefits of Electrified Powertrains in Medium- and Heavy-Duty Vehicles

2020 ◽  
Vol 11 (1) ◽  
pp. 12
Author(s):  
Ram Vijayagopal ◽  
Aymeric Rousseau
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Fuel Saving ◽  
Heavy Duty ◽  
Protection Agency ◽  
Light Duty ◽  
Design Choice ◽  
The Us ◽  
Light Duty Vehicles ◽  
Heavy Duty Vehicles

The benefits of electrified powertrains for light-duty vehicles are well understood, however sufficient published information is not available on the benefits of advanced powertrains on the various types of medium and heavy duty vehicles. Quantifying the benefits of powertrain electrification will help fleet operators understand the advantages or limitations in adopting electrified powertrains in their truck fleets. Trucks vary in size and shape, as they are designed for specific applications. It is necessary to model each kind of truck separately to understand what kind of powertrain architecture will be feasible for their daily operations. This paper examines 11 types of vehicles and 5 powertrain technology choices to quantify the fuel saving potential of each design choice. This study uses the regulatory cycles proposed by the US Environmental Protection Agency (EPA) for measuring fuel consumption.

scholarly journals Research on the Construction Method of the Service-Oriented Web-SWMM System

2019 ◽  
Vol 8 (6) ◽  
pp. 268 ◽  
Author(s):  
Dawei Xiao ◽  
Min Chen ◽  
Yuchen Lu ◽  
Songshan Yue ◽  
Tao Hou
Keyword(s):  
Environmental Protection Agency ◽  
Global Scale ◽  
Management Model ◽  
Urban Flooding ◽  
Rainfall Runoff ◽  
Protection Agency ◽  
Runoff Simulation ◽  
Storm Water Management Model ◽  
The Us ◽  
Service Oriented

On a global scale, with the acceleration of urbanization and the continuous expansion of cities, the problem of urban flooding has become increasingly prominent. An increasing number of experts and scholars have begun to focus on this phenomenon and build corresponding models to solve the problem. The storm water management model 5 (SWMM5) is a dynamic rainfall-runoff simulation model developed by the US Environmental Protection Agency (EPA); this model simulates urban flooding and drainage well and is widely favored by researchers. However, the use of SWMM5 is relatively cumbersome and limited by the operational platform, and these factors hinder the further promotion and sharing of SWMM5. Based on the OpenGMS platform, this study first encapsulates, deploys, and publishes SWMM5 and further builds the Web-SWMM system for the model. With Web-SWMM, the user can conveniently use network data resources online and call SWMM5 to carry out calculations, avoiding the difficulties caused by the localized use of SWMM5 and enabling the sharing and reuse of SWMM5.

scholarly journals An Interim Protocol for the Mitigation of Radon in Non-Residential Buildings

1994 ◽  
Vol 56 (1-4) ◽  
pp. 9-11 ◽  
Author(s):  
D.L. Wilson ◽  
C.S. Dudney ◽  
R.B. Gammage
Keyword(s):  
Environmental Protection Agency ◽  
Residential Buildings ◽  
Health And Safety ◽  
Protection Agency ◽  
Safety Issues ◽  
The Us ◽  
Process Studies ◽  
Radon Testing ◽  
Fire Codes ◽  
Large Building

Abstract To date, the US Environmental Protection Agency has not published guidance for radon testing, diagnostics, or mitigation within large, non-residential buildings. Current research indicates that large buildings may contain construction features or mechanical systems that could inhibit the installation or operation of a mitigation system. Health and safety issues such as asbestos and fire codes may further interfere with the installation process. Studies also show that elevated radon can be restricted to a particular area or room within a building and not be uniformly distributed. A four-step, sequential protocol has been developed to address these issues and facilitate large building radon mitigation.

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